Cover for tin cans



Dec.17,1946. H. c. DAUPHINAIS 2,412,603

COVERFOR TIN CANS Original Filed March 20, 1940' Patented Dec. 17, W46

UNITED STATES PATENT OFFICE Substitute for abandoned application SerialNo.

324,918, March 20, 1940. 8, 1945, Serial No. 592,588

1 Claim.

cially in the home and restaurants where long transportation of thecanned goods is not required.

A further object is to provide a cover which may be more convenientlyapplied than conventional covers requiring hand capping machines orsoldering and which will be inexpensive to manufacture.

A further object is to provide a canning tin can with a double bead atits top-one inner, and one outer bead, and a layer of metal connectingintegrally the two beads for reinforcement with a minimum of prominence,and to provide preferably a removable rubber sealing gasket betweeninner bead and layer of can and cover to hermetically seal the can.

With the above and other objects in view, the invention consists ofcertain novel details of construction and combinations of partshereinafter fully described and claimed, it being understood thatvarious modifications may be had without departing from the spirit orsacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification,

Fig. 1 is a plan view of a canning can cover constructed in accordancewith the invention, in applied position.

Fig. 2 is a cross sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is a top view of collar sectionally visible in Fig. 2.

Fig. 4 is a gasket to be placed between cover, and inner bead and toplayer of can.

Fig. 5 is a modified form of fastening collar of Fig. 3.

To provide a canning tin can in my invention one must first procure acan which has been hermetically sealed at both ends in the regular wayby canning machines and then preferably with a disc cutter, out off thecover internally near the top edge of the can so as to leave a thinstrip of metal sheeting enclosing the edge of the can and forming aperipheral bead on the open end thereof having a transversely curved topsurface and its lower portion terminating in an inner peripheralshoulder and an outer peripheral shoulder on the inner and outer facesrespectively of the body of the canwith a head at its top formed by alayer of metal enclosing This application May 2 the edge of the can forreinforcement with a minimum of prominence.

Referring now to the drawing in which like characters of referencedesignate similar parts in the various views, l designates acircumferentially flexible ring or collar preferably made of thin metalsheeting in one or more parts with a plurality of U-shaped loops orclips 3 of thin (fiat) metal sheeting preferably spot welded at a rightangle to surface of ring and integral to it as best seen in Fig. 3 andhaving its ends outwardly bent 4 and perforated 5 to receive threadedbolt 6 with threaded nut for said bolt. A modified form of fasteningcollar l is shown in Fig. 5 in providing horizontal-to-ring loops IS inplace of perforations 5 to receive threaded bolt 5 with threaded nut.After placing ring I around near top of can "I, the bolt 6 is placed inperforations 5 and the nut of bolt 6 tightened just enough so the ring Iwill abut firmly against outer shoulder 8 of can without slipping.

The cover 9 is in the form of a disc having a struck-up circularlypartly rounded channel 10 to be approximately in line with circular topof special layer on top of can I when cover is in position. Said coverhas a thin depending circular flange II a short distance but far enoughfrom outer edge of channel 40 to be outside of can instead of insidewhen cover is applied and providing more room in the can; said flange isalso used to hold in place preferably a circular flat rubber gasket l2before pressure is applied to cover 9. Said cover also has ahorizontally extended circular rim l3 perforated to receive threadedbolts M with threaded nuts to fit. The bolts M are placed inperforations in extension cover [3 and through loops 3 of ring I, and bytightening nuts for said bolts, the gasket I2 is compressed betweencover, and inner bead and top layer of can to hermetically seal the can.

This application is a substitute for my abandoned application SerialNumber 324,918, filed March 20, 1940.

What I claim is:

In combination a conventional cylindrical tin can which has been openedby severing an end wall from the inner periphery of the beaded edge ofthe can, said beaded edge forming for said can at the open end thereof atransversely curved terminal edge and an external peripheral shoulderclosely adjacent thereto, a device for closing the open end of said cancomprising a rigid metal plate secured to the open end of the can andclosing said opening, said plate having formed therein a relatively deepchannel substantially semicir- 3 cular in cross section and receivingtherein the. said bead of the can, a sealing gasket positioned in saidchannel and substantially enclosing the bead, means for clamping saidplate in sealing engagement with said gasket and bead, said meanscomprising a split ring clamped about the body of the can in abuttingengagement with said shoulder, said ring having rigidly secured theretospaced outwardly projecting ears, said plate having means outwardly ofsaid channel for receiving clamping bolts which cooperate with said earsto clamp the plate into sealing engagement with the end of said can,said metal plate having a depending concentric flange spaced a definitedistance outwardly of said channel to temporarily hold the gasket duringthe mounting of said plate in operative position.

HENRY CLEMENT DAUPHINAIS.

